[PATCH v2 3/5] dt-binding: soc: qcom: Add binding for RFSA
From: Bjorn Andersson <hidden>
Date: 2017-08-03 02:58:07
Also in:
linux-arm-msm, lkml
Subsystem:
arm/qualcomm mailing list, arm/qualcomm support, open firmware and flattened device tree bindings, the rest · Maintainers:
Bjorn Andersson, Konrad Dybcio, Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds
This adds the binding for describing shared memory used to exchange file system blocks between the RMTFS client and service. Signed-off-by: Bjorn Andersson <redacted> --- Changed since v1: - Memory described in a single reserved-memory node, rather than by reference from a "dummy" node - qcom,vmdid added .../bindings/reserved-memory/qcom,rfsa.txt | 51 ++++++++++++++++++++++ 1 file changed, 51 insertions(+) create mode 100644 Documentation/devicetree/bindings/reserved-memory/qcom,rfsa.txt
diff --git a/Documentation/devicetree/bindings/reserved-memory/qcom,rfsa.txt b/Documentation/devicetree/bindings/reserved-memory/qcom,rfsa.txt
new file mode 100644
index 000000000000..d9bec8eec696
--- /dev/null
+++ b/Documentation/devicetree/bindings/reserved-memory/qcom,rfsa.txt@@ -0,0 +1,51 @@ +Qualcomm Remote File System Access binding + +This binding describes the Qualcomm RFSA, which serves the purpose of +describing the shared memory region used for remote processors to access block +device data using the Remote Filesystem protocol. + +- compatible: + Usage: required + Value type: <stringlist> + Definition: must be: + "qcom,rfsa" + +- reg: + Usage: required for static allocation + Value type: <prop-encoded-array> + Definition: must specify base address and size of the memory region, + as described in reserved-memory.txt + +- size: + Usage: required for dynamic allocation + Value type: <prop-encoded-array> + Definition: must specify a size of the memory region, as described in + reserved-memory.txt + +- qcom,client-id: + Usage: required + Value type: <u32> + Definition: identifier of the client to use this region for buffers. + +- qcom,vmid: + Usage: optional + Value type: <u32> + Definition: vmid of the remote processor, to set up memory protection. + += EXAMPLE +The following example shows the RFSA setup for APQ8016, with the RFSA region +for the Hexagon DSP (id #1) located at 0x86700000. + + reserved-memory { + #address-cells = <2>; + #size-cells = <2>; + ranges; + + rmtfs@86700000 { + compatible = "qcom,rfsa"; + reg = <0x0 0x86700000 0x0 0xe0000>; + no-map; + + qcom,client-id = <1>; + }; + };
--
2.12.0